Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2008-09-29
2010-11-23
Seaman, D. Margaret (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
active
07838689
ABSTRACT:
A method for producing a phenolphthalein compound is disclosed, comprising: reacting a phenolic compound of the formula:wherein Rais a hydrogen or a C1-C12hydrocarbyl group, with a phthalic anhydride compound of the formula:wherein Rbis a hydrogen, a C1-C12hydrocarbyl group, or a halogen, in the presence of an ionic liquid catalyst composition and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula:wherein each Rais independently a hydrogen or a C1-C12hydrocarbyl group, and Rbis a hydrogen, a C1-C12hydrocarbyl group, or a halogen; wherein the ionic liquid catalyst composition comprises a combination of an ionic liquid and a metal halide wherein the metal is selected from the group consisting of a Group IIB, IIIA, VIII, or IVA metal, and a combination thereof.
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Bhotla Venkata Rama Narayanan Ganapathy
Dhar Dwairath
Kishan Gurram
Mallika Salkod Parameshwar
Cantor & Colburn LLP
Chandrakumar Nizal S
Sabic Innovative Plastics IP B.V.
Seaman D. Margaret
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